package com.yunyv.iotudpserve.TCP.listener;

import javax.servlet.ServletContextListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;

/********************************************************************************
 ** author： zhangtianhe
 ** date：2024年06月06日 18:30
 ** description&desc：
 *********************************************************************************/
public class TCPListener extends ServerSocket implements ServletContextListener {
    public TCPListener(int serverPort) throws IOException {
//用指定的端口构造一个ServerSocket
        super(serverPort);
        try {
            while (true) {
                //监听一端口，等待客户接入
                Socket socket = accept();
//将会话交给线程处理
                new ServerThread(socket);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        finally {
            close(); //关闭监听端口
        }
    }

    // inner-class ServerThread
    class ServerThread extends Thread {
        private Socket socket;
        private BufferedReader in;
        private PrintWriter out;

        // Ready to conversation
        public ServerThread(Socket s) throws IOException {
            this.socket = s;
// 构造该会话中的输入输出流
            in = new BufferedReader(new InputStreamReader(
                    socket.getInputStream(), "GB2312"));
            out = new PrintWriter(socket.getOutputStream(), true);
            start();
        }

        // Execute conversation
        public void run() {
            try {

// Communicate with client until "bye" received.
                while (true) {
// 通过输入流接收客户端信息
                    String line = in.readLine();
                    if ("bye".equals(line)) { // 是否终止会话
                        break;
                    }
                    System.out.println("Received message:" + line);
                    String msg = "'" + line + "'has been accepted by server.";
// 通过输出流向客户端发送信息
                    out.println(msg);
                    out.flush();
                }

                out.close();
                in.close();
                socket.close();

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
